2600mAh 鋰聚合物電池組，適用於 Ranger/Ultimate/Mega

Was worried about battery life during long classroom demos, but this pack keeps my Ultimate running through a full 90-minute session. The magic sticks hold it firmly in place, so no rattling around when the kids drive it over bumps. Charging is straightforward and it's way lighter than I expected.

Swapped this into my Ranger and it powers the whole build for a solid afternoon of driving around. The included magic sticks keep it from sliding loose, which was my main worry. Charges up fine overnight and it's light enough that the robot doesn't feel weighed down.

The magic sticks hold this thing in place way better than I expected, no rattling around when the robot moves. Charges up fine and my Ranger runs noticeably longer per session now.